Oops, I thought you were on about the wheelies

 

the slipping clutch trick to pull wheelies, been there, done that, will never do it again
the clutch disc grinding sound is just not pleasant to me.
so were they braking or just popping the clutch after down shift?

 

Don't slip the clutch just dump it - as long as the rest of the process has been carried out correctly you will get the front wheel up to the same position everytime and smoothly


I think they are using their back brakes for the slides.